Responsive Mobile-Friend Site Conversion Needed

Looking to rebuild a site built on old non-mobile-friendly custom programming.

New site must be fast, responsive, and mobile-friendly. I'd like to avoid Wordpress as site loads slow.

FUNCTIONALITY

FRONT-END (the site itself is very simple)
(no registry or login needed)
-visitors need to be able create posts to categories
-visitors need to be able to create comments on posts
-profanity script needs to run on posts to replace badwords with badw**** (current script can be modified)...

Responsive Mobile-Friend Site Conversion Needed

from Programming https://ift.tt/2LQbYdr
via IFTTT